Multiple arm lipomatosis and posterior interosseus nerve palsy.

Background: Lipomas are common benign soft tissue tumours which tend to be indolent and risk free. Lipomas rarely spread in the deep soft tissue causing posterior interosseous nerve (PIN) neuropathy.

Methods (case description): We present two patients with multiple lipomatosis of the arms and PIN paralysis, with a brief review of the cases reported in literature.

Results and conclusion: We emphasize the role of electromyographic study as unique methodical capable to reveal an early radial nerve damage, permitting an optimal post-surgical nerve function recovering.